$\"\"$

The expression is $\"\"$ .

Simplify the expression.

$\"\"$ (Original expression)

$\"\"$ (Rewrite the expression)

$\"\"$ (Simplify)

$\"\"$ (Cancel root terms)

Because $\"\"$ could not be negative, thus take the absolute value of $\"\"$ to identify the principal root.

$\"\"$

The simplified expression value is $\"\"$ .